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I run perfmon on one of the Production Server Machines. My aim was to monitor the Processor load.

This is the result: http://img443.imageshack.us/img443/3765/lf6.gif

Could you please tell me why "% Processor Time" of the process W3WP is higher than every other "% Processor Time" of the single processors and of the "% Processor Time" total?
Any suggestion?

parentissimo
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1 Answers1

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The % Processor Time of a process is calculated on a base line of (100 * number of logical processors).

The Total % Processor Time is not.

Nevertheless if % Processor Time of a process is greater than (100 * number of logical CPUS) it means that the process is using the processing units to more of their actual capacity.

More on the topic: Understanding % Processor Time

Sam Aleksov
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  • The Production Server has 8 physical CPUs (Intel Xeon E5520 @2,27 GHz). Could you please help me understand the picture? http://img443.imageshack.us/img443/3765/lf6.gif – parentissimo Jul 10 '13 at 11:14
  • @parentissimo Yes, the picture loks fine to me if the process is doing something. So in perfomon you're seeing that the process w3wp is using an average of 42% of your total computing power which in your case is 800% (100 * number of logical processors ) remember? This said, w3wp is using an average of 5.25% (42/800*100) of total cpu time. Cheers. – Sam Aleksov Jul 10 '13 at 11:48
  • Thanks a lot Sam! It is very halpful for me! – parentissimo Jul 10 '13 at 12:29
  • I cannot because, unfortunatly, I need a minimum reputation of 15 :-( – parentissimo Jul 10 '13 at 12:53
  • Thats fine happy to have helped :P Cheers. – Sam Aleksov Jul 10 '13 at 12:54
  • Excuse me Sam, but every CPU of the Production Server (Intel Xeon E5520 @2,27 GHz) is composed by 4 cores. So, are you sure that the logical processors are only 8? If 8 is the number of physical processors and every processor has 4 cores, so the number of logical processors is 32. Is it right? – parentissimo Jul 10 '13 at 15:03
  • Yes, this is correct the total number of logical processors is 32. My bad. So processor time for the process is 42/3200*100. – Sam Aleksov Jul 10 '13 at 15:06